You registered both servers on Feudaltools and activated Tradepost Mod on both Servers on your Dashboard?

even if the tradepost mod is not working, it shouldn't prevent anyone from connecting to the server.
No, I don't know at this point. But it sounds like connectivity issue to me, something is blocking or occupying the port.
Or maybe a server logfile can disclose the reason.

After a lot of time, found the problem... Was a port-forward issue. Was starting on 26001 and not on the 26000.